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Technology design method for milling curve surface of cold-working-die steel spliced piece at high speed

A cold work die steel, high-speed milling technology, applied in milling machine equipment, milling machine equipment details, metal processing equipment and other directions, can solve the problem of conflict between machining efficiency and machined surface quality, and achieve the effect of solving the conflict between machining efficiency and machined surface quality

Active Publication Date: 2015-12-09
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of conflict between high-speed milling processing efficiency and surface quality of splicing molds made of different materials, and to provide a process design method for high-speed milling cold-working mold steel splicing surface

Method used

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  • Technology design method for milling curve surface of cold-working-die steel spliced piece at high speed
  • Technology design method for milling curve surface of cold-working-die steel spliced piece at high speed
  • Technology design method for milling curve surface of cold-working-die steel spliced piece at high speed

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0072] Specific implementation mode 1: Experimental formula for surface roughness in high-speed milling Cr12MoV and 7CrSiMnMoV

[0073] (1) Using two indexable ball-end milling cutters with a diameter of 20mm and two teeth, the high-speed milling experiments of Cr12MoV and 7CrSiMnMoV were carried out on the MIKRONUCP710 five-axis CNC machining center; among them, the overhang of the milling cutter was 92mm, and the feed rate per tooth It is 0.3mm / z, the milling line spacing is 0.3mm, the milling depth is 0.2mm, and the inclination angle of milling cutter is 15°;

[0074] (2) The hardness test methods of Cr12MoV hardened steel and 7CrSiMnMoV specimens, and the cutting experiment plan are as follows: figure 1 , figure 2 And as shown in Table 1 and Table 2:

[0075] Table 1 Cr12MoV experimental scheme

[0076]

[0077] Table 27 CrSiMnMoV experimental scheme

[0078]

[0079] (3) Surface roughness R of Cr12MoV and 7CrSiMnMoV specimens processed along the line spacing di...

specific Embodiment approach 2

[0092] Specific implementation mode 2: Surface morphology experiment of high-speed milling Cr12MoV and 7CrSiMnMoV splicing parts

[0093] (1) Two materials with different hardnesses, Cr12MoV and 7CrSiMnMoV, are spliced ​​into a multi-hardness distribution specimen with a large hardness gradient. The hardness test method and cutting experiment plan of the specimen are as follows: Figure 5 and Table 5;

[0094] Table 5 Hardness test results of multi-hard reading splicing specimens

[0095]

[0096]

[0097] (2) A high-speed milling experiment was carried out on a MIKRONUCP710 five-axis CNC machining center with a two-tooth indexable ball-end milling cutter with a diameter of 20mm. Among them, the overhang of the milling cutter is 92mm, the feed rate per tooth is 0.3mm / z, the milling line spacing is 0.3mm, the milling depth is 0.2mm, and the inclination angle of the milling cutter is 15°;

[0098] (3) The surface roughness test results of Cr12MoV and 7CrSiMnMoV splicing sp...

specific Embodiment approach 3

[0107] Specific implementation method three: Experimental plan for high-speed milling of Cr12MoV and 7CrSiMnMoV curved surface splices

[0108] (1) Using a high-speed ball-end milling cutter to conduct high-speed milling experiments on Cr12MoV hardened steel and 7CrSiMnMoV curved surfaces on a MIKRONUCP710 five-axis CNC machining center; the model of the tool holder is BNMM-200075T-S20, the model of the blade is JC8003, and the number of teeth 2, the diameter of the milling cutter is 20mm, the overhang of the milling cutter is 100mm; the rotational speed of the milling cutter is 8000rpm, the feed rate is 4000mm / min, the milling line spacing is 0.3mm, and the milling depth is 0.2mm;

[0109] (2) Cr12MoV and 7CrSiMnMoV surface splicing specimens such as Figure 12 As shown; the size of the test piece is 100×48×50mm, the machined surface along the width direction is a ruled surface, and the machined surface along the length direction is a sinusoidal shape connected by curved surf...

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Abstract

A technology design method for milling a curve surface of a cold-working-die steel spliced piece at a high speed is disclosed, and relates to a high-speed milling method for a piece formed through splicing of two different kinds of materials. The method solves the problem that the high-speed milling processing efficiency of a different-material-spliced die curve surface conflicts with the processed surface quality. The method comprises: first step, establishing processed surface roughness experiment formulas of the two materials, so as to obtain a milling-cutter rotating speed design scheme of a high-speed milling experiment for the two-material-spliced piece; second step, determining the highest rotating speed of the high-speed milling experiment of the two-material-spliced curve-surface piece; third step, performing the high-speed milling experiment on the curve-surface spliced piece consisting of the two materials with different hardness; and forth step, providing a technological design scheme of the curve surface of the two-material-spliced piece subjected to high-speed milling. The method effectively solves the problem that the high-speed milling processing efficiency of a different-material-spliced die curve surface conflicts with the processed surface quality, and provides basis for making the high-speed milling technology enforcement scheme for the kind of die.

Description

technical field [0001] The present invention relates to a high-speed milling method for two types of splices made of different materials and an experimental formula for processing surface roughness thereof, in particular to an experimental formula for processing the surface roughness of high-speed milling Cr12MoV and 7CrSiMnMoV splices, and a high-speed milling method for curved surface splices of Cr12MoV and 7CrSiMnMoV splices . Background technique [0002] Large-scale automotive panel molds are the key process equipment for automobile production, and also an important guarantee for automobile personalization and upgrading. It has the characteristics of high manufacturing difficulty and high processing surface quality and precision. The convex and concave molds of this kind of mold are mostly processed as a whole after assembly of Cr12MoV inserts and 7CrSiMnMoV mold body. There are a large proportion of high-hardness quenching surface and low-hardness mold body surface in ...

Claims

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Application Information

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IPC IPC(8): B23C3/20
Inventor 姜彬徐彤
Owner HARBIN UNIV OF SCI & TECH
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